A Study of EM Failure in a Micro-Scale Pb-Free Solder Joint using a Custom Lab-Scale X-Ray Computed Tomography System

被引：4
|
作者：
Mertens, J. C. E. [1 ]
Chawla, Nikhilesh [1 ]
机构：
[1] Arizona State Univ, Tempe, AZ 85287 USA
来源：
DEVELOPMENTS IN X-RAY TOMOGRAPHY IX | 2014年 / 9212卷
关键词：
tomography; microtomography; micro-tomography; CT; microCT; micro-CT; solder; EM; MICROSTRUCTURAL CHARACTERIZATION; ELECTROMIGRATION; MICROTOMOGRAPHY; EVOLUTION; POROSITY; ALLOYS; GROWTH; DAMAGE;
D O I：
10.1117/12.2062638
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The three-dimensional (3D) microstuructural evolution in a Pb-free solder system undergoing accelerated electromigration (EM) testing is characterized using a custom, lab-scale, cone-beam, micro x-ray computed tomography (mu XCT) instrument. A micro-scale Sn-0.7Cu butt -joint was subjected to a current density of 10(4)A/cm(2) at 100 degrees C. The experimentation was enabled by the design of a miniature fixture for in situ imaging under accelerating EM testing conditions. The fixture is friendly to surface imaging and mu XCT scanning. The migrating species, copper and tin, are observed volumetrically through substrate dissolution, solder build-up, and the formation of reaction products in the solder joint by mu XCT imaging. The migration of the copper substrate and the formation of copper-tin reaction products is quantified.
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页数：9
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